Recti Fi Re/Regulator Test - Yamaha XC125 Service Manual

IELECl IC.A.O,.OS*STEM
RECTI FI RE/REGULATOR TEST
Since I.C. regulator is sealed with a resin, it is
impossible to check or replace any of inner
parts. If the regulator is found to be defective,
it must be replaced with a new one.
Checking method:
*- " '* (Regulator)
l • Connect D.C. voltmeter to the battery
terminals.
® Start engine.
Accelerate engine to approximately 2,000
r/min or more and check regulated voltage.
Regulated Voltage:
14 _ 15V
o If voltage is off, check battery, generator
and rectifier. If generator, rectifier and
battery are good, then I.C. regulator is
broken and it should be replaced.
NOTE:
1) Never disconnect wires from the battery
while the generator is in operation. If the
battery is disconnected, the voltage across
the generator terminals will increase,
damaging the semiconductors.
2) When checking the regulator being in-
stalled on a machine, the battery should
not be removed, and it should be fully
charged.
3) Never use a high voltage insulation ohm-
meter such as a megaohmmeter for such
a test. If high voltage is applied to the
regulator terminals, the regulator will
be damaged.
q
(Rectifier)
_- ..... -------O • Check silicon rectifier as specified using
(_C I :_ _ ohmmeter.
®, ®
i _:_[_; ® B (Red)
D D2 D 3 (_) U (White)
® _ (_) V (White)
(_ O- ,' ,_ (_) (_) W (White)
(_) C , (_) E (Black)
I
(_) I.C. regulator
I ; ; ;[ ; ; ®Br (Brown)
I D4 DsD 6
I
Gc ; !
L........
6-19